Improvement in boring-machines



l UNITED .STATES PATENT OFFICE.

AMOS LEONARD, OF SULLIVAN, OHIO.

IMPROVEMENT |N BORING-MACHINES.

Specification forming part of Letters lPatent No. 33,324, datedSeptember 17, 1861.

fo au whom', it may concern.-

Be it known that I, AMOS LEONARD, of Sullivan, in the county of Ashlandand State of Ohio, have invented new and useful Improve the accompanyingdrawings, making part of,

this specification, in which* Figure l is a perspective View. side view,and Fig. 3 is a top view.

Like letters refer to like parts.

The nature of my invention relates to the means employed for propellingthe auger while boring the hole, and the devices for withdrawingit fromthe timber when lthe hole is bored.

A represents the base or foundation of the machine. This consists ofabard-wood plank, say two feet long, one foot wide, and two inchesthick. At one end a piece is cut out about six inches in width and abouteight inches in length, as seen at B. Upon each side of the opening thusformed is inserted a post C, which posts form the guides to the slidingframe D. The sliding frame D contains the gearing by which the auger ispropelled.

E is the shaft that receives the shank of the auger. The upper end ofthis shaft carries a bevel-wheel F, which gears into the bevelwheel G,which is of greater diameter than the wheel F for the purpose ofincreasing the speed of the shaft E. The shaft that carries the wheel Gis horizontal, and contains, besides the wheel G, two pinions II and I.The pinionHgears into the main or driving wheel J, whose shaft is alsohorizontal. The driv Fig. 2 is a l ing-wheel J has a diameter of fromeight to ten inches, while the pinion H has not more than two or threeinches diameter. A quarter-revolution, therefore, of the wheel J willturn the auger-shaft E a number of times around.

The driving-wheel J is propelled by means of the lever K, whose fulcrumis upon the shaft of the wheel J. Two pawls L and L', which are held inplace by springs, serve to give motion to the wheel J whenever the leverK is moved up or down. Therefore every stroke of the lever in thedirection of the arrow will give the auger a number of revolutions, andrepeated strokes will soon cause it to penetrate the desired dept-h intothe timber.

M is a rack-lever. It is secured to the base at the lower end by meansof a screw or bolt. The upper end is free. That side next to the pinionI is furnished with teeth M', which gear into the pinion I by pressingupon the upper end of the lever M, which brings the teeth M into gearwith the pinion I. The pawl L is double-that is, it extends upwardthrough the lever K, as seen at N. Now in order to raise the slidingframe D, and with it the auger, the pawl N is pressed against the wheelJ while thevlever K is depressed, when by raising the lever the wheel Jls rotated backward, and the pinion I being acted upon by the rack M thewhole sliding frame D, with the gears and auger, is raised to the heightdesired.

What I claim as my improvement, and desire to secure by Letters Patent,is-

v The special arrangement of the lever K,

sliding frame D, rack-lever M, and intermediate gear-wheels, operatingsubstantially as and for the purpose specified, by which means the augeris caused to bore the mortise and is also raised up out of the holeafter being bored.

AMOS LEONARD.

IVitnesses:

W. H. BURRIDGE, J. W. BATTAR.

